When a wave is propagated from rarer medium to denser medium, which of the following will remain unchanged ?(a) Wave speed(b) Propagation constant(c) Frequency(d) N...

When a wave is propagated from rarer medium to denser medium, which of the following will remain unchanged ? (a) Wave speed (b) Propagation constant (c) Frequency (d) None of the above

All right. All time comes when we're talking about in the electromagnetic radiation we write down that See, the radiation speed is equal to its frequency times its wavelength. Now, this is true that radiation speed is equal to his frequency times its wavelength. But the speed of electromagnetic radiation actually changes based on the medium worrying. Okay, so really, we could more accurately right down that the speed is equal to the frequency times the wavelength. Now, it so happens that the frequency of electromagnetic wave is always the same, but the wavelength might change based on the medium. Okay, So for solving for wavelength in terms of the medium's speed, the medium's frequency, we're gonna get wavelength is equal to speed over frequency. So if we have one medium that has wavelength of one and the speed is C, then V is equal to see over F. But if we go to a different medium, it has wavelength. That changes. And our speed is now three quarters of C. This is going to be our new V r. New speed, and then f stays the same. So when we switch from medium one, two, medium two, the wavelengths of two, he's going to be equal to three quarters of the wavelength in mediums one. So if our speed changes by a factor of three over four, then our wavelength also changes by a factor of three over four. Okay, so wavelength in two decreased and the factor of change books was three for its.

Okay, so these are the four weeks now. First we's look a lamp, a jury, Let me use green color or AM picture. Okay, so first championship. So to find out a pitcher pitcher is the maximum displacement from the main coalition. So, for the way, he this is the distance future. And for B, this is the aptitude. Similarly first, see, this is a temperature for D. This is the aptitude. Now there stands depends upon your size of book or this picture. Now include, if you measure this in every a scientist, you find that on the computer is the largest for D on this modest for a on C has C and we are indigent. So in order off largest to list wrist most coolest D has the maximum amplitude on. Then, uh, he has the maximum temperature, then out off C and a then it has a bigger and prettier than see, and C has the least distance off. Okay, so we're done with the are from richest list. Now, what we want to our which in our is frequency. So I will use women. Sorry. So let me use rate for women. So you find out where, Then? I need two. Amazing. The lengths from, uh, this point Here, do this object. Stop. Wait here. Okay, so this is the weapon for a I'll be This is the weapon. Foresee? This is the limit. Now, Cordy, what I need to do is I did so this company Small way, right? So what? I can do this to measure this much on? Just do two times off this right to find out the whole Waveland. So the large equipment is that party, obviously. Then that is for eight. Then for being. Then see, it's This is the order now. No mercy. Let's look at a frequency now for frequency. We don't need to even measure because we know that. See, frequent their diversity. Easy called Yolanda into so frequency is equal to see by Landa. So the supplies that since C is constant hear frequencies inversely proportional. Only Lambda, right? So which has the greatest? So we just reversed this lambda Here are Lambda on Waveland. So the answer me see, be a Oh, right now This will want to party on that. He speeded. So for Peter, that is the reciprocal of frequency. So again we reversed the frequency. So that will be again. D it be. See? All right. So we are. We have ranked in the order from most list for rabbit your Web Lynn frequency at period.

In this problem on the topic off musical sounds We want to know what it means if it's on, becomes louder. Is the frequency increasing the Waveland, the amplitude or the speed? Now a change in frequency off a sound usually results as the perception off the pitch of the sound changing. So frequency is the quantitative measure off the pitch of the sound. The change in Waveland off a sound cannot be directly sensed. A change in speed off the sound is usually a sign that the sound wave is passing through various media. So, for example, if the sound wave passes from a through to water, its speed will change. But lastly, a change in amplitude off a sound wave is what will result in an increase in loudness off the sound. So the answer here is the amplitude is changing.

In problem when the brightness off light and the volume off sound are associated with which favor characteristic so amplitude So amplitude is the height off wave we generate intensity the brightness off light loudness off sound. So basically, the amplitude is how much energy develop have like free Sean. So if this is a wave like this and so this is the amplitude So this is the amplitude, which is the height off the wave. So this is the and pick you. So that means the aptitude is the how much energy the waves have. Okay, now the amplitude off the sound wave empty tude off a sound, Viv. Determine Determined it's loudness or volume. Okay. And, ah, larger amplitude means ah, louder sound. And a smaller amplitude means a softer sound since sound is a wave and we can relate the properties off sound to the property off faith The basic property off sounder like loudness So and they higher is the amplitude louder Is the sound or brighter the lights So height off sound wave determined the loudness and bigger the amplitude, the louder the sound so we can see that the brightness off light and the volume off sound. Ah, associated with amplitude Faith characteristic. We've corrected stick. So the correct option is option A, which is amplitude so the brightness off flight and the volume of sound are associated with amplitude. Wave characteristic Hence option. A amplitude is correct one. Thank you.